Abstract
To enlarge the electrochromic cyclic lifetime of poly (3-methtylthiophene) (PMET), the EDOT was copolymerized with the P3MT by electrochemical polymerization. The constant potential of 2.2 V was applied to the copolymer film growth in the electrolyte with 0.001 M EDOT and 0.1 M MET. The copolymer was achieved through the characteristics of the FT-IR and Raman analysis. The PMET-EDOT retained the vivid EC color from the PMET and the long cyclic stability from the PEDOT. The transmittance contrast of PMET-EDOT only decayed 1.5% after 1000 cycles. During the few components of EDOT in the copolymer, it seems similar that the transmittance spectrum and variation between the PMET-EDOT and PMET.
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